面向 Android 的 Consumer SDK 使用入门

Gradle

请将以下内容添加到 build.gradle 文件：

repositories {
    ...
    google()
}

Maven

请将以下内容添加到 pom.xml 文件：

<project>
  ...
  <repositories>
    <repository>
      <id>google-maven-repository</id>
      <url>https://maven.google.com</url>
    </repository>
  </repositories>
  ...
</project>

Java

class JsonAuthTokenFactory implements AuthTokenFactory {

  private static final String TOKEN_URL =
      "https://yourauthserver.example/token";

  private static class CachedToken {
    String tokenValue;
    long expiryTimeMs;
    String tripId;
  }

  private CachedToken token;

  /*
  * This method is called on a background thread. Blocking is OK. However, be
  * aware that no information can be obtained from Fleet Engine until this
  * method returns.
  */
  @Override
  public String getToken(AuthTokenContext context) {
    // If there is no existing token or token has expired, go get a new one.
    String tripId = context.getTripId();
    if (tripId == null) {
      throw new RuntimeException("Trip ID is missing from AuthTokenContext");
    }
    if (token == null || System.currentTimeMillis() > token.expiryTimeMs ||
        !tripId.equals(token.tripId)) {
      token = fetchNewToken(tripId);
    }
    return token.tokenValue;
  }

  private static CachedToken fetchNewToken(String tripId) {
    String url = TOKEN_URL + "/" + tripId;
    CachedToken token = new CachedToken();

    try (Reader r = new InputStreamReader(new URL(url).openStream())) {
      com.google.gson.JsonObject obj
          = com.google.gson.JsonParser.parseReader(r).getAsJsonObject();

      token.tokenValue = obj.get("ServiceToken").getAsString();
      token.expiryTimeMs = obj.get("TokenExpiryMs").getAsLong();

      /*
      * The expiry time could be an hour from now, but just to try and avoid
      * passing expired tokens, we subtract 5 minutes from that time.
      */
      token.expiryTimeMs -= 5 * 60 * 1000;
    } catch (IOException e) {
      /*
      * It's OK to throw exceptions here. The error listeners will receive the
      * error thrown here.
      */
      throw new RuntimeException("Could not get auth token", e);
    }
    token.tripId = tripId;

    return token;
  }
}

Kotlin

class JsonAuthTokenFactory : AuthTokenFactory() {

  private var token: CachedToken? = null

  /*
  * This method is called on a background thread. Blocking is OK. However, be
  * aware that no information can be obtained from Fleet Engine until this
  * method returns.
  */
  override fun getToken(context: AuthTokenContext): String {
    // If there is no existing token or token has expired, go get a new one.
    val tripId = 
      context.getTripId() ?: 
        throw RuntimeException("Trip ID is missing from AuthTokenContext")

    if (token == null || System.currentTimeMillis() > token.expiryTimeMs ||
        tripId != token.tripId) {
      token = fetchNewToken(tripId)
    }

    return token.tokenValue
  }

  class CachedToken(
    var tokenValue: String? = "", 
    var expiryTimeMs: Long = 0,
    var tripId: String? = "",
  )

  private companion object {
    const val TOKEN_URL = "https://yourauthserver.example/token"

    fun fetchNewToken(tripId: String) {
      val url = "$TOKEN_URL/$tripId"
      val token = CachedToken()

      try {
        val reader = InputStreamReader(URL(url).openStream())

        reader.use {
          val obj = com.google.gson.JsonParser.parseReader(r).getAsJsonObject()

          token.tokenValue = obj.get("ServiceToken").getAsString()
          token.expiryTimeMs = obj.get("TokenExpiryMs").getAsLong()

          /*
          * The expiry time could be an hour from now, but just to try and avoid
          * passing expired tokens, we subtract 5 minutes from that time.
          */
          token.expiryTimeMs -= 5 * 60 * 1000
        }
      } catch (e: IOException) {
        /*
        * It's OK to throw exceptions here. The error listeners will receive the
        * error thrown here.
        */
        throw RuntimeException("Could not get auth token", e)
      }

      token.tripId = tripId

      return token
    }
  }
}

Java

Task<ConsumerApi> consumerApiTask = ConsumerApi.initialize(
    this, "myProviderId", authTokenFactory);

consumerApiTask.addOnSuccessListener(
  consumerApi -> this.consumerApi = consumerApi);

Kotlin

val consumerApiTask =
  ConsumerApi.initialize(this, "myProviderId", authTokenFactory)

consumerApiTask?.addOnSuccessListener { consumerApi: ConsumerApi ->
  this@YourActivity.consumerApi = consumerApi
}

Gradle

将以下内容添加到 build.gradle 中：

dependencies {
  //...
  implementation "com.google.android.gms:play-services-maps:VERSION_NUMBER"
}

Maven

将以下内容添加到 pom.xml 中：

 <dependencies>
   ...
   <dependency>
     <groupId>com.google.android.gms</groupId>
     <artifactId>play-services-maps</artifactId>
     <version>18.1.0</version>
   </dependency>
 </dependencies>

Java

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  initViews();

  MapsInitializer.initialize(getApplicationContext(), Renderer.LATEST,
      new OnMapsSdkInitializedCallback() {
        @Override
        public void onMapsSdkInitialized(Renderer renderer) {
          switch (renderer) {
            case LATEST:
              Log.i("maps_renderer", "LATEST renderer");
              break;
            case LEGACY:
              Log.i("maps_renderer", "LEGACY renderer");
              break;
          }

          initializeConsumerSdk();
        }
      });
}

Kotlin

fun onCreate(savedInstanceState: Bundle?) {
  super.onCreate(savedInstanceState)
  setContentView(R.layout.main)
  initViews()

  MapsInitializer.initialize(
    getApplicationContext(), Renderer.LATEST,
    object : OnMapsSdkInitializedCallback() {
      fun onMapsSdkInitialized(renderer: Renderer?) {
        when (renderer) {
          LATEST -> Log.i("maps_renderer", "LATEST renderer")
          LEGACY -> Log.i("maps_renderer", "LEGACY renderer")
        }
        initializeConsumerSdk()
      }
    })
  }

Java

// ...
import android.support.v7.app.AppCompatActivity;

// ...

public class ConsumerTestActivity extends AppCompatActivity {
  // ...
}

Kotlin

// ...
import android.support.v7.app.AppCompatActivity

// ...

class ConsumerTestActivity : AppCompatActivity() {
  // ...
}

Java

public class SampleAppActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {

    // Find the ConsumerMapFragment.
    ConsumerMapFragment consumerMapFragment =
        (ConsumerMapFragment) fragmentManager.findFragmentById(R.id.consumer_map_fragment);

    // Initiate the callback that returns the map.
    if (consumerMapFragment != null) {
      consumerMapFragment.getConsumerGoogleMapAsync(
          new ConsumerMapReadyCallback() {
            // The map returned in the callback is used to access the ConsumerController.
            @Override
            public void onConsumerMapReady(@NonNull ConsumerGoogleMap consumerGoogleMap) {
              ConsumerController consumerController = consumerGoogleMap.getConsumerController();
            }
          });
    }
  }

}

Kotlin

class SampleAppActivity : AppCompatActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    // Find the ConsumerMapFragment.
    val consumerMapFragment =
      fragmentManager.findFragmentById(R.id.consumer_map_fragment) as ConsumerMapFragment

    consumerMapFragment.getConsumerGoogleMapAsync(
      object : ConsumerMapReadyCallback() {
        override fun onConsumerMapReady(consumerGoogleMap: ConsumerGoogleMap) {
          val consumerController = consumerGoogleMap.getConsumerController()!!
        }
      }
    )
  }
}

Java

public class SampleAppActivity extends AppCompatActivity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    ConsumerMapView mapView = findViewById(R.id.consumer_map_view);

    if (mapView != null) {
      mapView.getConsumerGoogleMapAsync(
          new ConsumerMapReadyCallback() {
            // The map returned in the callback is used to access the ConsumerController.
            @Override
            public void onConsumerMapReady(@NonNull ConsumerGoogleMap consumerGoogleMap) {
              ConsumerController consumerController = consumerGoogleMap.getConsumerController();
            }
          }, this, null);
    }
  }

}

Kotlin

class SampleAppActivity : AppCompatActivity() {
  override fun onCreate(savedInstanceState: Bundle?) {
    val mapView = findViewById(R.id.consumer_map_view) as ConsumerMapView

    mapView.getConsumerGoogleMapAsync(
      object : ConsumerMapReadyCallback() {
        // The map returned in the callback is used to access the ConsumerController.
        override fun onConsumerMapReady(consumerGoogleMap: ConsumerGoogleMap) {
          val consumerController = consumerGoogleMap.getConsumerController()!!
        }
      },
      /* fragmentActivity= */ this,
      /* googleMapOptions= */ null,
    )
  }
}

Java

public class MapViewInFragment extends Fragment {

  @Override
  public View onCreateView(
      @NonNull LayoutInflater layoutInflater,
      @Nullable ViewGroup viewGroup,
      @Nullable Bundle bundle) {
    return layoutInflater.inflate(R.layout.consumer_map_view, viewGroup, false);
  }

}

Kotlin

class MapViewInFragment : Fragment() {
  override fun onCreateView(
    layoutInflater: LayoutInflater,
    container: ViewGroup?,
    savedInstanceState: Bundle?,
  ): View {
    return layoutInflater.inflate(R.layout.consumer_map_view, viewGroup, false)
  }
}

Java

private ConsumerGoogleMap consumerGoogleMap;
private ConsumerController consumerController;
private ConsumerMapView consumerMapView;

consumerMapView.getConsumerGoogleMapAsync(
    new ConsumerMapReadyCallback() {
      @Override
      public void onConsumerMapReady(@NonNull ConsumerGoogleMap consumerMap) {
        consumerGoogleMap = consumerMap;
        consumerController = consumerMap.getConsumerController();
      }
    },
    this, null);

Kotlin

var consumerGoogleMap: ConsumerGoogleMap
var consumerController: ConsumerController
val consumerMapView = findViewById(R.id.consumer_map_view) as ConsumerMapView

consumerMapView.getConsumerGoogleMapAsync(
  object : ConsumerMapReadyCallback() {
    override fun onConsumerMapReady(consumerMap: ConsumerGoogleMap) {
      consumerGoogleMap = consumerMap
      consumerController = consumerMap.getConsumerController()
    },
    /* fragmentActivity= */ this,
    /* googleMapOptions= */ null,
  }
)

Java

public class MainActivity extends AppCompatActivity
    implements ConsumerViewModel.JourneySharingListener  {

  // Class implementation

  @Override
  protected void onDestroy() {
    super.onDestroy();

    if (journeySharingSession != null) {
      journeySharingSession.stop();
    }
  }
}

Kotlin

class SampleAppActivity : AppCompatActivity(), ConsumerViewModel.JourneySharingListener {

  // Class implementation

  override fun onDestroy() {
    super.onDestroy()

    journeySharingSession?.stop()
  }
}